Sophos

W32/Brontok-H

Category
Type
What to do
Prevalence low high

Summary

 
How it spreads
  • Email attachments
Affected operating systems Windows
Characteristics
  • Installs itself in the registry
Included in our products from February 2006 (4.02)
Protection available since 26 December 2005 14:39:37 (GMT)
Last updated 4 January 2006 13:51:39 (GMT)
Detected by All Sophos products

Action

More Information

W32/Brontok-H is a worm for the Windows platform.

When first run W32/Brontok-H copies itself to:

<User>\Local Settings\Application Data\GavGent.B
<User>\Local Settings\Application Data\IDTemplate.exe
<User>\Local Settings\Application Data\csrss.exe
<User>\Local Settings\Application Data\inetinfo.exe
<User>\Local Settings\Application Data\lsass.exe
<User>\Local Settings\Application Data\services.exe
<Startup>\Empty.pif
<Windows>\pif\cvt.exe

The following registry entries are created to run IDTemplate.exe and cvt.exe on startup:

HKCU\Software\Microsoft\Windows\CurrentVersion\Run
IDTemplates
<User>\Local Settings\Application Data\IDTemplate.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
SystemGent
<Windows>\PIF\CVT.exe

The following registry entry is set, disabling the registry editor (regedit):

HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System
DisableRegistryTools
1

Registry entries are set as follows:

HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
NoFolderOptions
1

HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System
DisableCMD
0

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